PARK HOME
PLAN YOUR VISIT
PHOTOS & MULTIMEDIA
HISTORY & CULTURE
NATURE & SCIENCE
FOR TEACHERS
NEWS
MANAGEMENT
SUPPORT YOUR PARK
Site Index
Frequently Asked Questions
Bookstore
Contact Us
Did You Know? Crater Lake was formed when a massive eruption of Mount Mazama 7700 years ago caused the mountain to collapse, leaving a steaming caldera. Centuries of rain and snow filled the caldera creating Crater Lake.
Last Updated: October 20, 2006 at 16:24 EST